Pneumatic tire.



S. J. SYDNEY. PNBUMATIC' TIRE. APPLICATION FILED APR.21,1914.

Patented Deo. 29. 1914 UNITED -sTATEs PATENT SIDNEY J. SYDNEY', or rHrLAnErrHIA, PENNSYLVANIA, Assiduo: orfana-naar nAvrn W. ALEXANDER, or TORONTO, oNrARro, cAngong I' A PNEUMATIC TIRE.

Specification of Letters Patent. n Patented LQ-14 Application filed April 21, 1914. Serial No. 833,484.

To all 'whom it may concern:

Be it known that I, SmNEr J. SYDNEY, a citizen of the United States, residing at Philadelphia, in the county of 1Bhiladelphia. and State of Pennsylvania, have invented certain new and useful Improvements in Pneumatic Tires; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in the manufacture of pneumatic tires, and more especially of the inner tubes for auto` mobile tires, and it consists in providing a special form of textile fabric embodied in the rubber of the shoe of the tire or tube, so as to freely permit the expansion and contraction, both laterally and circumferentially, of the tread portion thereof.

It is well known that such inner tubes ordinarily consist of a body portion of rubber,

and when it has been attempted to reinforce these with some textile fabric, th*` latter has been found to yield uneoually. and that it will stretch in one direction and contract in the other direction, `with the resulting edect of tearing the rubber, or the failure of the device to operate properly.

It is well known that ordinary textile fabrios if stretched in one direction will contract in a direction at right angles thereto` but according to my present invention I provide a reinforce made of textile material which will yield freely in both directions when stretched. l

My invention will be understood by reference to the accompanying drawings, in which Figure 1 shows the inner tube ofthe tire when inflated, parts being broken away; Fig. 2 shows a transverse section through the said inner tube when in the inflated condition and Fig. 3 shows, on a smaller scale, a strip of the woven material adapted for use in reinforcing'the tire or tube.

A represents the body of the inner tube,

made of rubber in the usual 'wa'.y, embefider in which is the textile fabric B, part oz' which E is woven of material adapted to stretch laterally, and is provided with strengthening strands or ribs b which strengthen the. band cirCumferentially, and at the same time limits to a small amount the circumferential stretching of the band, and

also permit the stretching of the band laterally.

The other portion bc. of the band is simi-V larly provided with strengthening ribs or strands b', but is woven in the corrugated form circumferentially. as shown at b2, the result being that the textile fabric is not only free to stretch laterally in a normal way, but these corrugations tend to straighten out as the rubber is stretched, thus permitting free stretching of the band longitudinally.

In practice, it is desirable only to have the convolutions in the tread portion or outer half of the tire or tube as shown in Fig. l; this portion being subjected to the alternate compressions and lexpansions due to the use of the tire on the road. The inner half of the member is not subjected to such expansions and contractions, or is, subjected to them in a very minor degree, and it will not be necessary to have these corrugations on the inner half of said tube.

It will obviously be preferable to have the corrugations of the greatest depth in the center of the tread portion and have the same fade away toward the inner portion of the member. as shown in Figs. l and 2.

By the herein described construction a thoroughly flexible reinforced inner tube is secured. which is especially adapted for long and hard usage.

IVhile I have described the construction as applied to inner tubes for `pneumatic tires, to which is is especially adapted, it will be obvious that it is also lapled for use in the manufacture of treads for Y; res or other like structures where a rf'anfe ced construction is desired which will ret n freely both lon- 2 1,12s,oa4

gitudinallyand' laterally when subjected to pressure, especially When said pressure is iru regularly applied.

claim as my invention. j p v A relnforced rubber tube for use 1n pneu'- matic tires, comprising a strip of textile masaid corrugations being formed of a. lenticu- 101 lar shape, and tapering toward the edges thereof, substantially as described.

In testimony whereof, I aiix my signature, vin presence of two Witnesses.

SIDNEY J.. SYDNEY. j Witnesses :A

R. S. Comun, PERGY S. BICKMORE. 

